package CollectionsDemo;

import com.sun.xml.internal.ws.policy.privateutil.PolicyUtils;

import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;

public class CollectionsDemo {
    public static void main(String[] args) {
        ArrayList<Student> array=new ArrayList<Student>();
        Student s1=new Student("zhangyuheng",50);
        Student s2=new Student("zhangyuheng2",5000);
        Student s3=new Student("zhangyuheng3",50000);
        Student s4=new Student("zhangyuheng4",500);
        array.add(s1);
        array.add(s2);
        array.add(s3);
        array.add(s4);
        Collections.sort(array, new Comparator<Student>() {
            @Override
            public int compare(Student s1, Student s2) {
                int num = s1.getAge() - s2.getAge();
                int num2 = num == 0 ? s1.getName().compareTo(s2.getName()) : num;
                return num2;
            }
        });
            for(Student s:array){
                System.out.println(s.getName()+","+s.getAge());
            }
        }}
